1 /* $NetBSD: cgfour.c,v 1.14 1997/10/05 18:24:33 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1995 Theo de Raadt. All rights reserved. 41 * Copyright (c) 1992, 1993 42 * The Regents of the University of California. All rights reserved. 43 * 44 * All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by Theo de Raadt. 47 * 48 * This software was developed by the Computer Systems Engineering group 49 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 50 * contributed to Berkeley. 51 * 52 * All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by the University of 55 * California, Lawrence Berkeley Laboratory. 56 * 57 * Redistribution and use in source and binary forms, with or without 58 * modification, are permitted provided that the following conditions 59 * are met: 60 * 1. Redistributions of source code must retain the above copyright 61 * notice, this list of conditions and the following disclaimer. 62 * 2. Redistributions in binary form must reproduce the above copyright 63 * notice, this list of conditions and the following disclaimer in the 64 * documentation and/or other materials provided with the distribution. 65 * 3. All advertising materials mentioning features or use of this software 66 * must display the following acknowledgement: 67 * This product includes software developed by the University of 68 * California, Berkeley and its contributors. 69 * 4. Neither the name of the University nor the names of its contributors 70 * may be used to endorse or promote products derived from this software 71 * without specific prior written permission. 72 * 73 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 74 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 75 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 76 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 77 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 78 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 79 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 80 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 81 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 82 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 83 * SUCH DAMAGE. 84 * 85 * from @(#)cgthree.c 8.2 (Berkeley) 10/30/93 86 */ 87 88 /* 89 * color display (cgfour) driver. 90 * 91 * Does not handle interrupts, even though they can occur. 92 * 93 * XXX should defer colormap updates to vertical retrace interrupts 94 */ 95 96 #include <sys/param.h> 97 #include <sys/systm.h> 98 #include <sys/buf.h> 99 #include <sys/device.h> 100 #include <sys/ioctl.h> 101 #include <sys/malloc.h> 102 #include <sys/mman.h> 103 #include <sys/tty.h> 104 #include <sys/conf.h> 105 106 #include <vm/vm.h> 107 108 #include <machine/fbio.h> 109 #include <machine/autoconf.h> 110 #include <machine/pmap.h> 111 #include <machine/fbvar.h> 112 #include <machine/eeprom.h> 113 #include <machine/conf.h> 114 115 #include <sparc/dev/btreg.h> 116 #include <sparc/dev/btvar.h> 117 #include <sparc/dev/pfourreg.h> 118 119 /* per-display variables */ 120 struct cgfour_softc { 121 struct device sc_dev; /* base device */ 122 struct fbdevice sc_fb; /* frame buffer device */ 123 struct rom_reg sc_phys; /* display RAM (phys addr) */ 124 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 125 int sc_bustype; /* type of bus we live on */ 126 union bt_cmap sc_cmap; /* Brooktree color map */ 127 }; 128 129 /* autoconfiguration driver */ 130 static void cgfourattach __P((struct device *, struct device *, void *)); 131 static int cgfourmatch __P((struct device *, struct cfdata *, void *)); 132 #if defined(SUN4) 133 static void cgfourunblank __P((struct device *)); 134 #endif 135 136 /* cdevsw prototypes */ 137 cdev_decl(cgfour); 138 139 struct cfattach cgfour_ca = { 140 sizeof(struct cgfour_softc), cgfourmatch, cgfourattach 141 }; 142 143 struct cfdriver cgfour_cd = { 144 NULL, "cgfour", DV_DULL 145 }; 146 147 #if defined(SUN4) 148 /* frame buffer generic driver */ 149 static struct fbdriver cgfourfbdriver = { 150 cgfourunblank, cgfouropen, cgfourclose, cgfourioctl, cgfourpoll, 151 cgfourmmap 152 }; 153 154 extern int fbnode; 155 extern struct tty *fbconstty; 156 157 static void cgfourloadcmap __P((struct cgfour_softc *, int, int)); 158 static int cgfour_get_video __P((struct cgfour_softc *)); 159 static void cgfour_set_video __P((struct cgfour_softc *, int)); 160 #endif 161 162 /* 163 * Match a cgfour. 164 */ 165 int 166 cgfourmatch(parent, cf, aux) 167 struct device *parent; 168 struct cfdata *cf; 169 void *aux; 170 { 171 struct confargs *ca = aux; 172 struct romaux *ra = &ca->ca_ra; 173 174 if (strcmp(cf->cf_driver->cd_name, ra->ra_name)) 175 return (0); 176 177 /* 178 * Mask out invalid flags from the user. 179 */ 180 cf->cf_flags &= FB_USERMASK; 181 182 /* 183 * Only exists on a sun4. 184 */ 185 if (!CPU_ISSUN4) 186 return (0); 187 188 /* 189 * Only exists on obio. 190 */ 191 if (ca->ca_bustype != BUS_OBIO) 192 return (0); 193 194 /* 195 * Make sure there's hardware there. 196 */ 197 if (probeget(ra->ra_vaddr, 4) == -1) 198 return (0); 199 200 #if defined(SUN4) 201 /* 202 * Check the pfour register. 203 */ 204 if (fb_pfour_id(ra->ra_vaddr) == PFOUR_ID_COLOR8P1) { 205 cf->cf_flags |= FB_PFOUR; 206 return (1); 207 } 208 #endif 209 210 return (0); 211 } 212 213 /* 214 * Attach a display. We need to notice if it is the console, too. 215 */ 216 void 217 cgfourattach(parent, self, args) 218 struct device *parent, *self; 219 void *args; 220 { 221 #if defined(SUN4) 222 register struct cgfour_softc *sc = (struct cgfour_softc *)self; 223 register struct confargs *ca = args; 224 register int node = 0, ramsize, i; 225 register volatile struct bt_regs *bt; 226 struct fbdevice *fb = &sc->sc_fb; 227 int isconsole; 228 229 fb->fb_driver = &cgfourfbdriver; 230 fb->fb_device = &sc->sc_dev; 231 fb->fb_type.fb_type = FBTYPE_SUN4COLOR; 232 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags; 233 234 /* 235 * Only pfour cgfours, thank you... 236 */ 237 if ((ca->ca_bustype != BUS_OBIO) || 238 ((fb->fb_flags & FB_PFOUR) == 0)) { 239 printf("%s: ignoring; not a pfour\n", sc->sc_dev.dv_xname); 240 return; 241 } 242 243 /* Map the pfour register. */ 244 fb->fb_pfour = (volatile u_int32_t *) 245 mapiodev(ca->ca_ra.ra_reg, 0, sizeof(u_int32_t)); 246 247 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 248 249 fb->fb_type.fb_depth = 8; 250 fb_setsize(fb, fb->fb_type.fb_depth, 1152, 900, node, ca->ca_bustype); 251 252 fb->fb_type.fb_cmsize = 256; 253 fb->fb_type.fb_size = ramsize; 254 printf(": cgfour/p4, %d x %d", fb->fb_type.fb_width, 255 fb->fb_type.fb_height); 256 257 isconsole = 0; 258 259 if (CPU_ISSUN4) { 260 struct eeprom *eep = (struct eeprom *)eeprom_va; 261 262 /* 263 * Assume this is the console if there's no eeprom info 264 * to be found. 265 */ 266 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 267 isconsole = (fbconstty != NULL); 268 } 269 270 #if 0 271 /* 272 * We don't do any of the console handling here. Instead, 273 * we let the bwtwo driver pick up the overlay plane and 274 * use it instead. Rconsole should have better performance 275 * with the 1-bit depth. 276 * -- Jason R. Thorpe <thorpej@NetBSD.ORG> 277 */ 278 279 /* 280 * When the ROM has mapped in a cgfour display, the address 281 * maps only the video RAM, so in any case we have to map the 282 * registers ourselves. We only need the video RAM if we are 283 * going to print characters via rconsole. 284 */ 285 286 if (isconsole) { 287 /* XXX this is kind of a waste */ 288 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 289 PFOUR_COLOR_OFF_OVERLAY, ramsize); 290 } 291 #endif 292 293 /* Map the Brooktree. */ 294 sc->sc_fbc = (volatile struct fbcontrol *) 295 mapiodev(ca->ca_ra.ra_reg, 296 PFOUR_COLOR_OFF_CMAP, sizeof(struct fbcontrol)); 297 298 sc->sc_phys = ca->ca_ra.ra_reg[0]; 299 sc->sc_bustype = ca->ca_bustype; 300 301 /* grab initial (current) color map */ 302 bt = &sc->sc_fbc->fbc_dac; 303 bt->bt_addr = 0; 304 for (i = 0; i < 256 * 3 / 4; i++) 305 ((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24; 306 307 BT_INIT(bt, 24); 308 309 #if 0 /* See above. */ 310 if (isconsole) { 311 printf(" (console)\n"); 312 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 313 fbrcons_init(fb); 314 #endif 315 } else 316 #endif /* 0 */ 317 printf("\n"); 318 319 /* 320 * Even though we're not using rconsole, we'd still like 321 * to notice if we're the console framebuffer. 322 */ 323 fb_attach(fb, isconsole); 324 #endif 325 } 326 327 int 328 cgfouropen(dev, flags, mode, p) 329 dev_t dev; 330 int flags, mode; 331 struct proc *p; 332 { 333 int unit = minor(dev); 334 335 if (unit >= cgfour_cd.cd_ndevs || cgfour_cd.cd_devs[unit] == NULL) 336 return (ENXIO); 337 return (0); 338 } 339 340 int 341 cgfourclose(dev, flags, mode, p) 342 dev_t dev; 343 int flags, mode; 344 struct proc *p; 345 { 346 347 return (0); 348 } 349 350 int 351 cgfourioctl(dev, cmd, data, flags, p) 352 dev_t dev; 353 u_long cmd; 354 register caddr_t data; 355 int flags; 356 struct proc *p; 357 { 358 #if defined(SUN4) 359 register struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 360 register struct fbgattr *fba; 361 int error; 362 363 switch (cmd) { 364 365 case FBIOGTYPE: 366 *(struct fbtype *)data = sc->sc_fb.fb_type; 367 break; 368 369 case FBIOGATTR: 370 fba = (struct fbgattr *)data; 371 fba->real_type = sc->sc_fb.fb_type.fb_type; 372 fba->owner = 0; /* XXX ??? */ 373 fba->fbtype = sc->sc_fb.fb_type; 374 fba->sattr.flags = 0; 375 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 376 fba->sattr.dev_specific[0] = -1; 377 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 378 fba->emu_types[1] = -1; 379 break; 380 381 case FBIOGETCMAP: 382 return (bt_getcmap((struct fbcmap *)data, &sc->sc_cmap, 256)); 383 384 case FBIOPUTCMAP: 385 /* copy to software map */ 386 #define p ((struct fbcmap *)data) 387 error = bt_putcmap(p, &sc->sc_cmap, 256); 388 if (error) 389 return (error); 390 /* now blast them into the chip */ 391 /* XXX should use retrace interrupt */ 392 cgfourloadcmap(sc, p->index, p->count); 393 #undef p 394 break; 395 396 case FBIOGVIDEO: 397 *(int *)data = cgfour_get_video(sc); 398 break; 399 400 case FBIOSVIDEO: 401 cgfour_set_video(sc, *(int *)data); 402 break; 403 404 default: 405 return (ENOTTY); 406 } 407 #endif 408 return (0); 409 } 410 411 int 412 cgfourpoll(dev, events, p) 413 dev_t dev; 414 int events; 415 struct proc *p; 416 { 417 418 return (seltrue(dev, events, p)); 419 } 420 421 /* 422 * Return the address that would map the given device at the given 423 * offset, allowing for the given protection, or return -1 for error. 424 * 425 * the cg4 maps it's overlay plane for 128K, followed by the enable 426 * plane for 128K, followed by the colour plane (for as much colour 427 * as their is.) 428 * 429 * As well, mapping at an offset of 0x04000000 causes the cg4 to map 430 * only it's colour plane, at 0. 431 */ 432 int 433 cgfourmmap(dev, off, prot) 434 dev_t dev; 435 int off, prot; 436 { 437 register struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 438 int poff; 439 440 #define START_ENABLE (128*1024) 441 #define START_COLOR ((128*1024) + (128*1024)) 442 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 443 sc->sc_fb.fb_type.fb_height) 444 #define END_COLOR (START_COLOR + COLOR_SIZE) 445 #define NOOVERLAY (0x04000000) 446 447 if (off & PGOFSET) 448 panic("cgfourmap"); 449 450 if ((u_int)off >= NOOVERLAY) { 451 off -= NOOVERLAY; 452 453 /* 454 * X11 maps a huge chunk of the frame buffer; far more than 455 * there really is. We compensate by double-mapping the 456 * first page for as many other pages as it wants 457 */ 458 while (off >= COLOR_SIZE) 459 off -= COLOR_SIZE; /* XXX thorpej ??? */ 460 461 poff = off + PFOUR_COLOR_OFF_COLOR; 462 } else if ((u_int)off < START_ENABLE) { 463 /* 464 * in overlay plane 465 */ 466 poff = PFOUR_COLOR_OFF_OVERLAY + off; 467 } else if ((u_int)off < START_COLOR) { 468 /* 469 * in enable plane 470 */ 471 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 472 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 473 /* 474 * in colour plane 475 */ 476 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 477 } else 478 return (-1); 479 480 return (REG2PHYS(&sc->sc_phys, poff) | PMAP_NC); 481 } 482 483 #if defined(SUN4) 484 /* 485 * Undo the effect of an FBIOSVIDEO that turns the video off. 486 */ 487 static void 488 cgfourunblank(dev) 489 struct device *dev; 490 { 491 492 cgfour_set_video((struct cgfour_softc *)dev, 1); 493 } 494 495 static int 496 cgfour_get_video(sc) 497 struct cgfour_softc *sc; 498 { 499 500 return (fb_pfour_get_video(&sc->sc_fb)); 501 } 502 503 static void 504 cgfour_set_video(sc, enable) 505 struct cgfour_softc *sc; 506 int enable; 507 { 508 509 fb_pfour_set_video(&sc->sc_fb, enable); 510 } 511 512 /* 513 * Load a subset of the current (new) colormap into the Brooktree DAC. 514 */ 515 static void 516 cgfourloadcmap(sc, start, ncolors) 517 register struct cgfour_softc *sc; 518 register int start, ncolors; 519 { 520 register volatile struct bt_regs *bt; 521 register u_int *ip, i; 522 register int count; 523 524 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 525 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 526 bt = &sc->sc_fbc->fbc_dac; 527 bt->bt_addr = BT_D4M4(start) << 24; 528 while (--count >= 0) { 529 i = *ip++; 530 /* hardware that makes one want to pound boards with hammers */ 531 bt->bt_cmap = i; 532 bt->bt_cmap = i << 8; 533 bt->bt_cmap = i << 16; 534 bt->bt_cmap = i << 24; 535 } 536 } 537 #endif 538